How to Install a Ceiling Heating Using the Plastering Method

Installation instructions

Our kit for retrofitting ceiling heating using the plastering method combines simple, tool-less installation with great flexibility in implementation. To demonstrate this, we have carried out a test installation of approximately 3 m² and documented it in pictures. The main installation steps are shown and briefly described on this page. Detailed installation instructions can be downloaded at the bottom of this page and are included with each heating kit.

The plastering kit contains all the components needed to retrofit ceiling surfaces as heating surfaces. The 10 mm PE-RT heating pipes are quickly and neatly laid in the previously installed honeycomb elements. The ceiling heating is connected to the existing heating system via return temperature limiters and allows independent control. Suitable plaster materials for ceiling heating are gypsum plaster, lime plaster and clay plaster and must be purchased separately.

Installation of a plaster ceiling heating

Planning of the installation
Installation check
Finishing the plaster ceiling heating

To conclude

Despite the simple design of the plaster ceiling heating system and the ease of installation, we must point out that, as the manufacturer, we can only guarantee correct delivery from the factory and not installation and connection by third parties. Please also observe the current standards and regulations for heating systems.

FLEXIRO wishes you all the best with the implementation of your project!



Yes, it is possible to use the ceiling heating kit for cooling in summer. Sufficient cool water supply is required though. Further details can be found at: How to use a ceiling heating as cooling ceiling. 

If there is an unheated room above the ceiling activated with FLEXIRO and the old ceiling has no thermal insulation or the heat transfer coefficient of the ceiling is unknown, we recommend adding an additional insulation layer. In any case, thermal insulation above the ceiling heating will shorten the reaction time of the heating.

The substructure for the ceiling heating should comply with the dry construction guidelines for suspended ceilings. When using CD profiles and direct hangers, a suspension height of approx. 5 cm can already be sufficient. A small distance to the raw ceiling is also required for the installation of the FLEXIRO connection pipes and plug connections. The dry construction guidelines also permit the use of wooden beams as a substructure for the plasterboard. However, their stability and torsional stiffness is usually less good compared to CD profiles made of metal.